Back seat extender for dogs



FIG. 1 is a front view of a back seat extender for dogs showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines are representing stitching of the back seat extender for dogs and the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a back seat extender for dogs, as shown and described. 